Stock deflector for flow boxes for paper-making machines



Feb. 21, 1928. 1,660,274

A. N. RUSSELL STOCK DEFLECTOR FOR FLOW BOXES FOR PAPER MAKING MACHINES Filed Dec. 22. 1926 INVE N T OR ANDREWJV-RUSSELL ATTORNEY I Patented Feb. 21, 1928.

UNITED STATES ANDREW n. RUSSELL, or LAoHInE, QUEBEC, CANADA,

STOCK DEFLECTOR FOR FLOW BOXES FOR PAPER MAKING MACHINES.

Application filed December 22, 1926. Serial No. 156,430.

This invention relates to new and useful improvements in fiowboxes for paper making machines,and particularly to means positioned outside of the flow box for regulating the flow therefrom to suit the size of the sheet of paper under manufacture, and the main object of the invention is to provide adjustable means for deflecting the surplus stock from the flow box orifice in such-a manner that the flow on to the Wire of the machine will be even and undisturbed and of a width equal to the size of the sheet of paper under manufacture.

Another object is to provide a stock deflector which will be simple in construction, easy to operate and efficient in the results obtained. In my invention I provide a pond plate which is adjustable in the lateral direct-ion ,of' the wire of a paper making machine andis positioned between the orifice of the flow box andthe deckle straps. The

edge of'theplate in proximity to the flow box is tapered toa knife edge sothat it will cut into the stock without disturbing its direction of flow on to the wire. Securedto and movable with the pond plate is the deflector pipe which carries the surplus stock clear of the wire,iand this pipevmay be led to a storage tank, (not shown) or back to the stockpond or flow box. i

In the drawings which illustrate one form of my invention; i

Figure 1 is a side elevation shown partly in section of the stock pond and that part of the papermachine in proximity thereto.

Figure 2 is a partial plan of the device showing one side and one end of the paper making machine,.the deflect-or and the flow box or stock pond.

Referring. more particularly to-the drawings, 11 designates a flow box or stock pond of any of the well-known types used in this art, and 12 the base plate thereof. Secured to the baseplate and forming part thereof, is the apron 13, the outer edge of which may be tapered so that said; edge may be brought close to the wire to feed the stock or pulp directly thereon. The front of the flow box is provided with the usual slice plate 14', which may be moved in the vertical direction to regulate the size of orifice between it and the apron. The stock flows through said orifice onto the wire of the machine. The lower edge of the slice plate is preferably, but not necessarily, nearer the fiow box than the edge of the apron, as

shown in Figure 1. The wire 16 of the machine moves in the direction indicated by arrow at and is stretched around the breast roll 17, which is rotatably mounted in brackets l8 formed in the frame of the paper making machine (not shown). The edge of the apron is preferably placed in proximity to the point where the wire forms a tangent with the breast roll and the bottom of the flow box is adapted to practically align with thepulp carrying surface of the 1 1,660,214 PATENT OFFICE.

wire. Mounted above the wire and in proximity to the side of the machine, is the deckle strap l8,'whic h moves in the same direction and inproxlmity to the wire and forms a guide forthe stock mounted thereon. The

deckle straps are of the endless type and pass around the deckle strap-pulleys 18". The'pulleys and the deckle strap are adjustable in the lateral direction of the wire, and the sides 19 of the fioW boxma-y also be made adjustable in the same direction. There is a space between the orifice of the flow box and the deckle straps, through which the stock may fiowin an uneven manner. The foregoing isdescriptive of a machine well-known in this art,- and my improvementlies in placing an adjustabledefiector between the flow box orifice and'the deckle strap to filllup thelspace between them. In the-space referred to I provide an adjustable pond plate 20, the inner face 1210f which is adapted to align with the in- The pond plate extends across the deckle strap, and the edge 27 of the plate remote from the orifice is curved to fit against the deckle strap. Secured to the pond plate and movable therewith, is the pipe 23, the open end of which is turned toward the flow box and its edges contacting with the apron and the slice plate. The pipe shown is for' illustrative purposesonly and may be modified to suit existing conditions of the machine, so that it will lead the surplus stock clear of same, As will be seen in Figure 2, the movement of the pipe or pond plate is from the position shown in full lines, to that shownin dotted lines, a

distance approximately equal to the width of the pipe opening. The frame of the ma chine is shown in dotted lines and the pond plate may be adjustably secured to said frame in the following manner. A bracket 24: is secured to the pond plate and attached to said bracket is the spindle 25, which is mounted in a bracket 26 formed on the frame ofthe machine in such a manner that it'may be removed in the lateral direction of the wire. Y

In the drawings I have only shown one side of the machine, but it will be readily understood that the device may be duplicated on the other side of the machine, so that the width of the paper under construction may be kept in the centre of the wire and between the deckle straps. The pipe may be connected to apump, not shown, which will deliver the surplus stock back intothe flow box.

In operation the deckle straps are adjusted to suit the size of the sheet of pulp required on the wire of the machine. The adjustable sides of the flow box are arranged to align with the straps and aligning with the inner faces of both the strap and the said side, is the pond plate which fills the space between them and prevents the flow of pulp therethrough. The slice is raised to allow the pulp to flow on to the wire of the machine. The pulp flowing through the slice is cut into by the knife edge of the pond plate and the surplus stock flows down the pipe clear of the machine without disturbing the fiow of pulp on to the wire.

This construction of pond plate or deflector forms a simple, efficient, and easily 0perated means for regulating the. amount of stock to be delivered on to the wire and accomplishes same without disturbing the flow of stock thereon, a much desired feature which cannot be accomplished on regulators at present in use, in which the width of the orifice is blocked or reduced by means of plates covering part of the orifice, and against which the pulp gathers and when released'flows through the orifice in a thickwire, and provided with means to deflect. the surplus stock from the wire of the machine.

2. In a paper making machine having a flow box, slice plate, pulp carrying wire, means to support the wire, and deckle straps, means positioned between the flow box and the deckle straps and above the wire to keep the flow of pulp on to the wire between the deckle straps, and means to carry the surplus stock clear of thewire without disturb-- ing the flow of stock.

3. In a paper makingmachine, a flow box having adjustable sides, a slice plate, a pulp carrying endless wire, deckle straps adjustable in the lateral direction of the wire and means positioned between the slice and the deckle straps andfilling the space-therebetween, saidmeansbeing adjustable in the lateral direction ofithe wireandadapted to 1 align with the deckle straps and the adjustable sides of the flow box toregulatethe flow of pulp on to the wire, and means for carrying off surplus stock clear of the wire without distributing the required flow of-pulp thereto. r V 4. A pulp flow regulating device for paper making machinescomprising, a flow box, a travelling wire positioned below the orifice from the flow box, deckle straps travelling with and adjustable in the lateral direction of the wire, a pond plate between the deckle straps and the orifice of the flow box and tilling thespace therebetween, means for adjusting the plate in the lateral direction of the wire and means attached tothe pond plate to carry off the surplus stock clear of the wire, said means being adapted to cover the orifice of theflow box between the outside edges thereof, and the edges of the pond per making machines having a flow box, an

endless travelling pulp supporting wire,

and deckle straps travelling with the wire, pond plates positioned between the orifice-of the flow box and the deckle straps filling the space therebetween, said plates having their edges adjacent the flow box of knife edge 7 construction to cut into the flow without disturbing the direction thereof, and means se- In witness whereof, I have hereunto set my hand.

ANDREW N. RUSSELL. 

